Until 1975 German mothers did not pass on citizenship to children born in wedlock, only German fathers did. To address historic gender discrimination in citizenship practices Germany has defined a declaration process called Staatsangehörigkeit § 5. I wrote about our experience with this process, which we completed in 2023.
In the 20th century several million Germans emigrated to the United States. Staatsangehörigkeit § 5 is applicable to a very large number of their descendants today. From a post on r/GermanCitizenship about an April 2025 visit to the German Consulate:
The caseload has increased exponentially in the past 4 months. He said that aside from all the appointments each day, they get between 80 and 90 inquiries a day in the Chicago office alone.
The Staatsangehörigkeit § 5 process will be open for ten years. Having started in August 2021, declarations will be accepted until August 2031. The current wait time in the queue to be processed is about 2.5 years, and is likely to grow with the number of Americans now applying.
If you were born to a German mother prior to 1975 and you'd consider this declaration of German citizenship, I'd advise starting on it soon.